Apr 10 2018

Nile perch meat stays in Egypt – the bladder goes to China – Video

Ownership of the video and the review: Abdel Rahman El Gamal (Founder of the video channel)

I filmed this video on 1st April 2018 during my visit to a relatively large fish market in Cairo (Zaton). I was lucky to be in the market during the processing of this specimen of Nile perch (Lates niloticus) of about 2.5 kg weight. Nile perch in Egypt comes from two main fishery resources; Lake Nasser (Aswan) and Rayaan Depression (Fayoum). In general, Nile perch is considered a luxury freshwater fish that enjoys higher market price than tilapia. The species is appreciated by a category of consumers who are interested in large-size fish with high-quality meat such as Nile perch.

In regard to the swim bladder to fills most of the body cavity, it is frozen and temporarily stored until sold to the trader who visits the fish market periodically and collects the swim bladders from various fish displays in this market and other markets to be shipped to China. This type of business is new and may go back to around five years. The sale price for a weight unit of the bladder is much higher than that for the Nile perch fillets and hence providing additional revenue to fish traders at no additional effort.

The bladders enjoy a high demand in China, where traditional medicine is advanced, whereas the swim bladder is used in the pharmaceutical industry. According to some published articles, the gas bladders may be used in the making of bio-degradable stitches for surgery. Moreover, swim bladders are an ingredient in nutritious soups in China. It may worth mentioning that the trade in Nile perch swim bladders has developed especially in countries sharing Lake Victoria where the Nile perch fishery is significant.

https://youtu.be/4scYwDI1ffI

 

Permanent link to this article: https://fishconsult.org/?p=14397

Apr 10 2018

Collecting Nile tilapia broodstock from Lake Victoria (Kenya)

Photo credit: Gideon Gicheru (Kenya)

Review: Gideon Gicheru and Abdel Rahman El Gamal (Founder of the website)

According to FAO statistics, the contribution of tilapia in total aquaculture is almost consistent with a very narrow range from 72.8% to 74.7% during the period from 2010 to 2016, whereas in tonnage tilapia aquaculture produced 9115, 166602, 16115, 17626, 18072, 13991 and 11180 tons over seven years from 2010 to 2016 bearing in mind that Nile tilapia (Oreochromis niloticus) is the only tilapia species cultured in Kenya.

Such development in aquaculture and in particular in tilapia aquaculture necessitated a high demand of quality fish seed for Nile tilapia in sufficient numbers produced in a large number of hatcheries located in various parts of Kenya.

Typically, operating hatcheries in Kenya keep the broodfish for three years before replacing it with a new stock. The broodfish are usually obtained either from other hatcheries or collected from the wild. The inserted picture was taken at the shore of Lake Victoria, (Obaria Beach) Homabay County whereas the staff from Kisii County fish hatchery are ready to collect Nile Tilapia broodfish.

 

 

Permanent link to this article: https://fishconsult.org/?p=14393

Mar 31 2018

Climate change in Zambia

A permission has been granted from the report owners to publish the report on this site

 

 

 

 

 

 

 

 

 

Climate change in Zambia

Permanent link to this article: https://fishconsult.org/?p=14375

Mar 31 2018

Cage culture of striped catfish in An Giang Province (Vietnam)

Photo credit: Han Huong (Vietnam)

Review: Abdel Rahman El Gamal (Founder of the website)

 

 

Viet Nam is by far the world’s largest producer of Pangasius with a production that exceeded 1.2 million tons in 2013 and with an annual export turnover of at least US$ 2 billion.  The striped catfish (Pangasius hypophthalmus) which is locally known as “Tra” is the leading Pangasius species that is farmed in commercial aquaculture in Vietnam.

The cage culture of catfish in Vietnam has a relatively long history that started in the 1960s whereas cages are usually sited on major river tributaries of the Mekong River delta. The An Giang province has witnessed a significant development in regard to cage aquaculture reaching about 3000 cages in An Giang province with about 40,000 tons in the year 2000. During the early farming of pangasius, the collection of fingerlings from nature was the only source to stock the cages. However, after the successful artificial reproduction of the species, the collection of the wild fry and fingerlings has been banned and hence the hatchery-produced seeds became the only source for cage stocking. In brief, the farming of “tra catfish” is the most important aquatic farming sector in Vietnam from both a social and an economic point of view.

The stocking density of fish ranges typically from 100-150 specimens/m3. With the scaling-up of cage farming, the use of commercial pellets became essential. Usually, the entire cage is harvested at a single harvest in order to meet the large volume requirements of the processing plants.

It may worth mentioning that the cage culture of pangasius showed a considerable decrease between 2003 and 2007. The decrease has been attributed to farming economics as well as disease outbreaks.

 

 

Permanent link to this article: https://fishconsult.org/?p=14371

Mar 26 2018

Fishing activities by a Somono fisherman’s family along Niger River in Mali

Credit: Elisabeth den Otter (Bozo and Somono fishermen of Mali)

 

 

The inserted photos show some activities of a Somono migrant family in Mali. Typically,  from October until January every year, Bozo/Somono migrants camp on the shore of the Niger river. Their stay coincides with the arrival of large shoals of ‘ntinenin’, a type of sardine.

These particular pictures belong to the Kané family that is an extended family consisting of the fisherman with his wife and a number of children.

As shown in the pictures, men are fishing in their fishing boats, while women sell the fish and take care of the household (cooking and the children). Their makeshift dwellings are made of straw mats and pieces of cloth.

 

 

Permanent link to this article: https://fishconsult.org/?p=14351

Mar 25 2018

Climate change in Guatemala (in Spanish)

A permission has been granted by the authors to publish the report on this website

 

 

 

 

 

 

 

 

 

 

Climate change in Guatemala

Permanent link to this article: https://fishconsult.org/?p=14347

Mar 22 2018

Artemia from marine hatcheries to the outer space

Review: Abdel Rahman El Gamal (Founder of the website)

 

The inserted picture shows a brine shrimp tank that is typically found in most of marine hatcheries. This is based on the high nutritional value as well as the appropriate sizes of artemia species that suit the feeding requirements for the early stages of marine finfish larvae and the postlarvae of crustaceans.

Interestingly, artemia has been among the animals taken to the outer space during 1970s through the US Apollo 16, and Apollo 17 missions as well as on the former Soviet Union Cosmos 782 and Cosmos 1129. The brine shrimp cysts were subject to series of experiments with various objectives whereas the overall studies targeted to understand the impact of space environment on the experimental animals including brine shrimp and in particular to explore possible effects of cosmic rays -if any- on artemia and relate that to the possible impact of such radiation on astronauts with an ultimate goal of making the space flights safer for humans. During particular mission (e.g. Apollo 16 and 17), the brine shrimp cysts had a round-trip from earth to the moon and back.

 

 

Permanent link to this article: https://fishconsult.org/?p=14342

Mar 14 2018

Tank spawning of Nile tilapia in Aswan (Egypt) – Video

Video credit: Jhons Huayanay Ostos (Peru)

Review: Abdel Rahman El Gamal (Founder of the video channel)

 

 

 

 

This video was filmed in a large size tilapia hatchery in Aswan, Egypt. This hatchery belongs to the Lake Nasser Development Authority. The hatchery-produced of Nile tilapia, (Oreochromis niloticus) are used for a stock enhancement program for Lake Nasser. The video shows the outdoor facility that consists of series of concrete tanks.  In fact, the genetic purity of produced fingerlings is considerably high since broodstock are always abundant from the lake and no genetic programs are taking place in the hatchery practices.

https://youtu.be/MAkdYqQ_Yvo

 

Permanent link to this article: https://fishconsult.org/?p=14337

Mar 12 2018

Seed production of Nile tilapia and Pez blanco in El Remate Production and training Center (Guatemala)

Photo credit: Cele Anaitte Mendez Garcia (Guatemala)

Review: Cele Anaitte Mendez Garcia and Abdel Rahman El Gamal (Founder of the website)

 

The photo shows the production and training Center located in the village “El Remate”, Guatemala. Among the activities carried out in the center is the seed production of Nile tilapia (Oreochromis niloticus) and that of Pez Blanco (Petenia splendida). In fact, the production of Pez Blanco seed is considered a means towards conserving this native species whereas the fry produced have been stocked in Lake Peten Itzá (north of Guatemala). The center enjoyed a technical support of the Mission of Taiwan in cooperation with the Guatemalan government as represented by DIPESCA (formerly called UNIPESCA) which is affiliated to the Ministry of Agriculture.

The seeds produced in the center are supporting the development of aquaculture in the region especially the climatic conditions is favorable for aquaculture development.

 

 

Permanent link to this article: https://fishconsult.org/?p=14334

Feb 13 2018

Culture of red tilapia in a biofloc system in Colombia – Video

Video credit: Marleyi Acuna Torres (Colombia)

Review: Marleyi Acuna Torres and Abdel Rahman El Gamal (Founder of the video channel)

 

 

 

 

 

This video was filmed in an aquaculture facility located in the north of Santander (Colombia). The project has an area of 3000 m2 where red tilapia is the cultured fish in a biofloc system.

The fingerlings of red tilapia with an average size of 0.5 g are stocked at a rate of 50 fingerlings/m2. After 6 months, fish are harvested with a harvestable size of about 350 g/fish. The project units allow the production of 4 tons of fish every 2 months. In addition to the biofloc, commercial feed is used in the project.

This particular project is financed by “Ibero-American Social Security Organization”- OISS to the key beneficiary as represented by the “APA association of Juan Frio” with the aim of supporting the victims of the armed conflicts. The project is technically managed by the APA association that provides also the training required to run the project.

https://youtu.be/1aXz4JCeHnc

Permanent link to this article: https://fishconsult.org/?p=14317

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